Long Term Liabilities (Schedule Of Long Term Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Long Term Liabilities [Abstract]
Indemnification liabilities (See Note 16)	$ 12,290	$ 12,204
Liabilities for uncertain tax positions	81,179	80,732	140,454	139,916
Other liabilities	6,099	2,905
Long term liabilities, Total	$ 99,568	$ 95,841